Problem $2$

The maximum factored shear in the $6$ in by $9$ in concrete

beam shown is $2000$ lbf $.$ The compressive strength of

concrete is $3000lb\frac{f}{i}{n}^2$ and the yield stress of the steel

reinforcement is $60,000lb\frac{f}{i}{n}^2.$

What is the required shear reinforcement?

$($A$)$ no$.3$ U$-$stirrups at $3\mathrm{.}75$ in spacing

$($B$)$ no$.3$ U$-$stirrups at $4\mathrm{.}5$ in spacing

$($C$)$ no$.3$ U$-$stirrups at $24$ in spacing

$($D$)$ none